Question

How many electrons are required to balance the following half-reaction?

N2 + 5 H+ ⟶ N2H5+
A. 4 electrons on the products side

B. 2 electrons on the products side

C. 2 electrons on the reactants side

D. 4 electrons on the reactants side

Answer 1

Option D.

Step-by-step explanation:

4 e⁻ + N2 + 5 H+ ⟶ N2H5+

The only way that charges are ballanced.

N2H5+ comes from hydrazine, which act as a base.

N2H4 + H2O → N2H5+ + OH-